Apparatus for raising concrete forms.



2 SHEETSSHEET i.

PATENTED JUNE 4, 1907.

III

APPLICATION FILED IEB.4, 1907.

R. H. FOLWELL & W. SINKS.

APPARATUS FOR RAISING CONCRETE FORMS.

PATENTED JUNE 4, 1907. R. H. FOLWELL & W. R. SINKS.

APPARATUS FOR RAISING CONCRETE FORMS- APPLIGATION FILED FEB.4,1907.

2 SHEETSSHEET 2- fizz 022K02 unrrnn sira'rns garner neuron RUSSELL H.FOLWELL AND WILLIAM R. SIN KS, OF CHICAGO, ILLINOIS.

APPARATLlS FOR RAiSING CONCRETE FOFWIS.

Specification of Letters Patent.

yatented June 4, 1907.

Application filed February 4, 1907. Serial No. 355,715.

T all whom it may concern.-

it known that we, RUSSELL H. FOL- WELL and VVILLIA'M R. SINKS, citizensof the 'United States, and residents of Chicago, county of Cook, andState of Illinois, have invented certain new and useful Improvements inApparatus for Raising Concrete Forms, of which the following is aspecification, and which are illustrated in, the accompanying drawings,forming a part thereof.

The invention relates to means for erecting concrete structures, andmore particularly to apparatus for supporting and raising the forms ormolds and the staging employed in building vertical concrete walls, I

The object of the invention is to facilitate the erection of concretestructures, and the invention is exemplified in the apparatus to behereinafter described and illustrated in the accompanying drawings, inwhich Fi ure 1 shows in vertical cross-section a detail of a concretewall in course of erection, and apparatus constructed in accordance withthe invention-applied thereto; Fig. 2 is a sideelevation, partly insection, of the same; Fig. 3 is atop planview of the same and Figs. 4and 5 aresectional views taken on the lines 44 and 55, respectively, ofFig. 1. v

A detail of the vertical wall of a concrete structure is shown in thedrawings at 10. It

is provided with the usual vertical stays 11,-

about which the concrete mixture is, formed in building, the concretethen be ng confined,

13, 14, applied to either side of the wall, and carried by a frame 15,which straddles the top of the completed portion of the wall. As shownthe frame 1-5 is composed of channel irons 16, 17, united by a headblock 18, and tied together; below the head block by threaded .bolts 19designed to prevent the spreading of the mold at its base.

Preferably a plurality of frames 15 are r0- vided, these being locatedat intervals a ong the wall 10, and the mold boards 13, 14, may becontinued between the frames, as most clearly shown in Fig. 4, toprovide an integral form for the entire Wall of the structure to beerected. In use this .form is' raised from time to time as the buildingof the wall proceeds, and by means of the invention this ected 'iy lifing jacks which react l .11 1G. The buildthe use of are discarded untilset, in a form 12 comprising mold boards when .the wall is completed, isthereby avoided. a

As shown each of the frames 15 is so disposed as to embrace one of thestay rods 11 of the wall, and an externally threaded sleeve '20 inclosesthe rod 11 and turns in a nut 21.

carried by the head 18 of the frame 15. At

the foot of the sleeve 20 there is mounted, in such a way as to permitindependent 1;ota-

tion of the sleeve, a clutch 22 for grip ing the rod 11. At the up erend of the s eeve 20 are laterally-directe sockets 23, into any one ofwhich abar 24 may be inserted for turning the sleeve.

Preferably the clutch 22 takes the form of a stout block 25 having acentral aperture' 26 for receiving therod 11, and having its lower facerecessed, as indicated at 27, to accommodate apair of clamping jaws 28,29. The

,jaws 28, 29, each have a rounded base 30,

which engages the correspondingly-shaped wall of the recess 27 to permitthe swingin of the jaws over the o ening 26 after the manner of atoggle, an each of the jaws is normally raised by a s ring 31 which, asshown, takes the form 0 a plate, secured to the block member of theclutch by screws32.

The downward movement of the jaws is limited by headed screw-b6lts 33,which extend through apertures in the jaws into the block 25. The footof the sleeve 20 bears'u on the top of the block 25, and is rotatab yconnected to the block by means of intercalating flanges 34, 35, formedon the block and on the sleeve, respectively.

In building a wall the form 12 is fitted over the foundation (notshown), the sleeve 20 at I each 'of the frames 15 being applied to oneof the stay rods 11-, and being secured at any desired height thereon bymeans of the clutch 22, for supporting the form. The space between themold boards 13, 14, is then filled with concrete in the usual manner,the frames 15, with the mold boards 13, 14, being raised a shortdistance from time to time as the filling proceeds by turning thethreaded sleeve 20 'rovided at each frame. In this way the wail maybemade of any desired height by the use of a single form, and its surfacewill be smoothed by the movement of the mold boards 13, 14, thereon, aswith a trowel.

When the sleeve 20 has been turned for as great a distance within thenut 21 as its length will permit, it may be turned in the oppositedirection, thereby raising the clutch 22- for a new hold upon the rod11, the fori 11 12 being supported in the'mea'ntime part by th adhesionof the mold boards 13, 14, to

' ri'ed by the frames 15 to providea footing'for fn'ent being given thethreaded sleeve '20 at each stay rod at frequent intervals duringworkmen, and a single attendant or gang of attendants may then travelfrom one of the fi-amesl5 to' another, raising the forms and staging afew inches at each of these points successively, without interruptingthe work of those engaged in building the Wall. der to prevent the moldboards 13, 14, rigidly adhering 'to any portionof the wall and --toimprove the external appearance of the wall, the raising operationpreferably comprises-a large number of short steps, a slight movetheprogress of the work.

Bending of the exposed portion of the stay rod 11 belowthe clutch 22 maybe avoided by the use of a guide plate 36 carried by the frame members16, 17, and having a central aperture 37 for receiving the rod.

While we have illustrated our invention as applied to the building ofthe curved wall of a round structure, it may be adapted to the formationof the walls of structures having any form of outline, and as theraising ofthe molds is effected from a point directly over the center ofthe wall there is no tendency for the molds to run to one side and thusimpart a lean to the wall.

We claim as our invention.

1. In combination, an externally-threaded sleeve; a clutch carried bythe sleeve for en,- gaging a rod inserted therethrough, a nut runningonthe sleeve, a mold, and connection between the nut and mold.

2. In combination, a supporting rod, a rotatable extcrnally threadedsleeve slidable on the rod, a nut running on the sleeve, a

In or-v mold, connection between the nut and mold, and'a clutch carriedby the sleeve 'for engaging the rod.

3, In a form for a concrete structure-haviing a stay rod, incombination,a clutch for engaging the rod, an externally-threaded sleeve incloslngthe rod and bearing on the carried by the nut, and means for turning thesleeve.

clutch, a nut running on the sleeve, a mold '4.' In a form. for aconcrete structure hav- I ing' a continuous stay rod, in cornbination,a

clutch for shift'ably engaging the rod, and a mold carried by theclutch.

6. In a form for a concrete structure having a continuous-stay rod, incombination, a

clutch for engaging the rod; a threadedshaft bearing on the clutch, anut running on the shaft, and'a mold carried by the nut.

7. In combination, an externally-threaded sleeve, a clutch carried bythe sleeve for engaging a rod inserted therethrough, and comprising ablock rot'atably mounted at the foot of the sleeve and having an openingin register with the openin 'of the sleeve, and jaws carried by the blocto swing over the opening in the form of a toggle,.a nut running-on thesleeve and a mold carried by the nut.

'8. In a device of thekind described, in combination, anexternally-threaded sleeve,

a clutch carried by the sleeve for engaging a rod inserted therethrough,and a load carrying nut running on the sleeve.

9. In a form for a concrete wall having a stay rod, in combination, amold frame for straddling the wall, a clutch for engaging the rod, alifting jack reacting betweenthe clutch and the frame, and a guide forthe rod car- 5 ried by the legs of the frame below the clutch.

RUSSELL H. FOLVV ELL. WILLIAM R. SINKS.

\ Vitncsses:

J. W. THOMPSON,- F. A. NELSON.

